When you ask "What number is halfway between 23 and 872?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=23 and Y=872.
To find the number halfway between 23 and 872, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 872 into our formula, we get:
(23 + 872)/2 = 447.5
Thus, the number halfway between 23 and 872 is 447.5.
To check that our answer is correct, we subtract 23 from 447.5 and subtract 447.5 from 872 and compare the two numbers:
447.5 - 23 = 424.5
872 - 447.5 = 424.5
As you can see, the halfway number is 424.5 higher than 23 and 424.5 lower than 872. Therefore, our halfway between answer of 447.5 above is correct.
Halfway Between
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Halfway Between 23 and 873
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